Pressure-controlled intermittent coronary sinus occlusion apparatus and method
First Claim
1. Apparatus for intermittently occluding a coronary sinus comprisingmeans for occluding said sinus,a pressure transducer for sensing the fluid pressure within said sinus and providing corresponding fluid pressure signals, anda controller responsive to said transducer having means for providing trigger signals to said occluding means to trigger an occlusion and to interrupt said occlusion, said apparatus being characterized in thatsaid controller includes means to estimate a plateau level of said fluid pressure during each occlusion and means to provide the trigger signal to interrupt each said occlusion on the basis of said estimate.
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Accused Products
Abstract
The coronary sinus is intermittently occluded by use of means for occluding the sinus, a pressure transducer for sensing the fluid pressure within the sinus and providing corresponding fluid pressure signals, and a controller responsive to the transducer and arranged to provide trigger signals to the occluding means to trigger an occlusion and to interrupt the occlusion, the system being characterized in that the controller is arranged to estimate a plateau level of the fluid pressure during each occlusion and for providing a trigger signal to interrupt each occlusion on the basis of the estimate. The duration of the interruption before the next occlusion is controlled in response to the volume flow in the sinus during the interruption. Pharmacological agents are injected into the sinus during the occlusion, for retroprofusion to the heart tissue. An analysis of heart function is obtained by analyzing the local pressure maxima in successive heartbeats during occlusion. Initiation of the next occlusion is time based on fluid pressure signals taken from the sinus during occlusion. The degree of tissue at risk of infraction (or the amount of infarcted tissue) is estimated based on the fluid pressure signals.
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Citations
39 Claims
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1. Apparatus for intermittently occluding a coronary sinus comprising
means for occluding said sinus, a pressure transducer for sensing the fluid pressure within said sinus and providing corresponding fluid pressure signals, and a controller responsive to said transducer having means for providing trigger signals to said occluding means to trigger an occlusion and to interrupt said occlusion, said apparatus being characterized in that said controller includes means to estimate a plateau level of said fluid pressure during each occlusion and means to provide the trigger signal to interrupt each said occlusion on the basis of said estimate.
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12. A method for intermittently occluding a coronary sinus, comprising
providing means for occluding said sinus and for measuring the local pressure maximum within said sinus during each heartbeat, causing occlusion of said sinus, measuring the local pressure maxima for successive heartbeats during said occlusion, said method being characterized by the steps of estimating the plateau level of said local pressure maxima, and interrupting said occlusion on the basis of said estimate.
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18. Apparatus for intermittently occluding a coronary sinus comprising
means for occluding said sinus, and a controller having means for providing trigger signals to said occluding means to trigger an occlusion and to interrupt said occlusion, said apparatus being characterized in that a sensor is provided for delivering flow signals indicative of the volume flow of fluid in said sinus during periods when said occlusion is being interrupted, and said controller includes means to trigger the initiation of the next said occlusion at a time determined by said flow signals.
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24. A method for intermittently occluding a coronary sinus comprising
providing means for occluding said sinus, occluding said sinus, and thereafter interrupting said occlusion, the method being characterized by the steps of determining the flow within said sinus during said interruption, determining the time of the peak of said flow, and triggering the next occlusion of said sinus at a time determined by when said peak occurs.
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25. Apparatus for intermittently occluding a coronary sinus comprising
means for occluding said sinus, and a controller having means for providing trigger signals to said occluding means to trigger an occlusion and to interrupt said occlusion, said apparatus being characterized in that a pressure transducer is provided for sensing the fluid pressure within said sinus during said occlusion and providing corresponding fluid pressure signals, and said controller has means for triggering the initiation of the next said occlusion at a time based on said fluid pressure signals.
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33. A method for intermittently occluding a coronary sinus comprising
providing means for occluding said sinus, occluding said sinus, and thereafter interrupting said occlusion, the method being characterized by the steps of: -
sensing the fluid pressure within said sinus during said occlusion and providing corresponding fluid pressure signals, and triggering the initiation of the next said occlusion at a time dependent on said fluid pressure signals. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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Specification